class_docstr: Tests that the template defines the correct decomposition.
docstr: Checks the state is correct if the weights are zero.
docstr_tok: ["Checks","the","state","is","correct","if","the","weights","are","zero","."]
code: def test_state_zero_weights(self, qubit_device, n_subsystems, tol):
      """Checks the state is correct if the weights are zero."""
  
      features = [np.pi, np.pi / 2, np.pi / 4, 0]
      if n_subsystems == 1:
          shp = (1, 1)
      elif n_subsystems == 2:
          shp = (1, 3)
      else:
          shp = (1, 2 * n_subsystems)
  
      weights = np.zeros(shape=shp)
  
      @qml.qnode(qubit_device)
      def circuit(x=None):
          qml.QAOAEmbedding(
              features=x, weights=weights, wires=range(n_subsystems)
          )
          return [
              qml.expval(qml.PauliZ(i)) for i in range(n_subsystems)
          ]
  
      res = circuit(x=features[:n_subsystems])
      target = [1, -1, 0, 1, 1]
      assert np.allclose(res, target[:n_subsystems], atol=tol, rtol=0)
  
imports: import pytest
  import numpy
  import pennylane
  from pennylane import numpy
label_desc: Use image node_id 5 for calling the TestDecomposition obj's underlying member method code with example usage: obj.test_state_zero_weights(qubit_device, n_subsystems, tol) and returns: unknown